March 8, 2026
1000 North Marshall Street, USA

Perfect for gamers with limited bandwidth or slower internet connections.

Standard PSP ISO files dump the entire UMD disc, which often includes padded data and duplicate files. A highly compressed version optimizes this data or converts it into a CSO (Compressed ISO) format. This compression reduces the file size significantly without removing actual game content, audio, or textures.

A standard PSP ISO for this compilation usually requires around of storage space. However, using advanced compression algorithms (like converting the file format from .ISO to .CSO or utilizing 7z/RAR archives), the file size can be reduced down to under 300MB . Key Benefits:

| Game | Original ISO Size | Realistic Compressed Size (CSO) | |------|------------------|--------------------------------| | (includes MS 1,2,X,3,4,5,6) | ~1.6 GB | ~700 MB - 1 GB (CSO) | | Metal Slug XX (PSP exclusive port of MS7) | ~400 MB | ~250 MB - 300 MB (CSO) |